Shuttle-tension-controlling mechanism for looms



April 17, 1928. 1,666,443

- c. H. DRAPER SHUTTLE TENSION CONTROLLING MECHANISM FOR LOOMS FiledDec. 18, 1925 F I5 4 4g Patented Apr. 17, 1928.

UNITED STATES PATENT OFFICE-q CLARE H. DRAPER, OF HOPEDALE,MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, T DRAPE-R CORPORATION,813 HOPEDALE, MASSACHUSETTS, A CORPORA:

TION OF MAINE.

SHUTTLE-TENSION-CONTROLLING MECHANISM FOR LOOMS.

Application filed December 18, 1925. Serial No. 76,204.

' The present invention relates to an improvement in .shuttle tensioncontrolling mechanism for looms.

The present construction is an improvement on the construction of thepatent to Draper & Northrop, No. 1,556,207, dated October 6, 1925. Theinvention consists in the construction hereinafter described and particularly defined in the claims.

Inthe accompanying drawings illustrating the preferred form of theinvention,

Fig. 1 is a sectional elevation of the lay and associated parts; Fig. 2is a detail showing the inertia arm and its connection with the daggershaft; and Fig. 3 is a section taken on the line 33, Fig. 2.

. The illustrated embodiment of the invention is described asfollowszThe lay is supported on the swords 11, provided with the shuttlebox 12, adapted to receive a shuttle. The shuttle binder 14 isv of theusual form, and is activated by the binder fingers 15 to cause pressureto be exerted upon the shuttle in the box. The shuttle 5 fingers aremounted on the arms 16 of the vdagger shaft 17, mounted in brackets onthe lay in the usual manner and encircled by a coil spring operatlng totend to turn the shaft in the direction to depress the dagger as isusual. The dagger 18 is carried by the dagger shaft 17, and adapted toengage the steel 19 of the frog 20 in the usual manner. A11 inertia arm21 is loosely mounted on the dagger shaft 17, as shown in Fig. 2, andcarries the weight 22 secured to it. The hub 23 of the inertia arm isheld from move ment to the left, as viewed in Fig. 2, by

means of the collar 24, which is'secured on the dagger shaft 17.Movement in the opposite direction to the right, as viewed in Fig. 2, isprevented by the collar 25, which is secured on the dagger shaft 17 by aset screw. The collar 25 is provided with the dagger stop 26, adapted toengage the plate 27 on the under side of the lay 10, for'the purpose ofpreventing overthrow of the dagger, as is usual. I a

In the construction illustrated in said patent, the movements of thedagger shaft, binder fingers and associated parts are controlled bytheir weight,the binder shaft spring, and the weight of the inertia arm,as described therein, but during the first part of the forward movementof the lay the binders were, in addition, urged inward by the inertiaarm, with the result that the arm and is adapted to engage the lay, as

shown in Fig. 1, thereby preventing it from urging the binder fingersinwardly during the first part of the forward movement of the lay. e

Connections between the inertia arm and the dagger shaft permit a slightoscillatory motion of the inertia arm on the dagger shaft by reason ofthe fact that the sleeve 25 and the hub 23 have interlocking portions,as shown in Fig. 2. That is to say, the upper half of the right hand endofthe hub 23 of the inertia arm is cut away to receive the interlockingextension 29 of the sleeve 25, andthe lower right hand portion 30 of thehub 28 constitutes an extension which is received in what may be termedfor convenience, the cut-away portion of the sleeve 25. By reference toFig. 3 it will be seen that the extension 29 andthe extension 30 afforda permissible, free movement of the inertia arm with respect to thedagger shaft of about 30. Connected to the extension 29 by a broken lineis shown the binder finger 15, which parts are rigidly connectedtogether, as the dagger sleeve 25 is rigidly secured to the daggershaft, which rigidly carries the dagger finger. Similarly the extension30 is shown as connected by a broken linewith the inertia arm 21 towhich it is rigidly attached, being made'integral therewith, and thestop '28 is also shown as connected by a broken line with the extension30, with which extension it is integrallyformed. It is also shown inengagement with the lay 10.

The operation of the mechanism of this application is identical with theoperation of the mechanism of the said patent, with the exception thatduring the first part of the forward movement of the lay' from backcenter, as it starts to move forward from back center and until theshuttle is received in the box, the action of the inertia arm on frontposition and starting on itsbackward movement, rearward motion isimparted to the, inertia arm by the lay, but the inertia of the weight22 causes said weight to take up the accelerating rearward movement ofthe lay more slowly than the lay itself, with the result that the weight22 and lay will have relative movement and effect relief of pressure ofthe dagger fingers on the hind ers during part of the lay rearwardmovement or until the lay has reached about top centre. Since theshuttle is picked at about top centre, the binder pressure on theshuttle is thus released at the picking point. As the lay passes backcentre and starts frontwardly its movement is accelerated until bottomcentre is reached and is then gradually diminished until the lay reachesfront centre where itsmovement is arrested, and since the inertia armand weight are carried by the lay, thestop 28 engages the lay asthelatter starts frontward, and as front centre is reached by the lay withgradually diminishing velocity until it comes to rest, the inertia ofthe inertia arm and weight effects relief of binder pressure as the layreaches front centre and therefore at the time of bobbin transfer whichis effected at substantially this point in the. lay movement.

When the lay is at back center, as indirated by Figs. 1 and 3, the stop28 of the inertia arm engages the lay, as shown, and such engagementcontinues as the lay moves frontwardly, and since the face 31 of theinertia arm hub 30 does not press upon the face 32 of the extension 29of the dagger sleeve because of the engagement of the stop 28 with thelay, the inertia arm .is prevented from acting through the dagger sleeveor dagger rod during frontward movement of the lay, but as the lay slowsdown and finally stops at front position, while the inertia arm contnues under ts inertia to swing frontwardly,the gap shown at the r ght ofFig. 3

is closed and the inertia arm then acts through the extension 29 of thedagger sleeve to relieve the binder pressure.

Having thus described the invention, what is claimed is: V v r 1.-Shuttle box tension controlling mechanism for weft replenishing looms ofthe bobbin changing type having, in combination, a lay, a shuttle, abinder, a spring actuated provided with a weight below the dagger rod,

and means for preventing the inertia arm and weight from acting on thebinders during shuttle boxing.

2. Shuttle box tension controlling mechanism for weft replenishing loomsof the bobbin changing type having, in combination, a lay, a shuttlebox, a binder for the shuttle box, and inertia controlled tensionapplying means for applying pressure to the binders acting to decreasethe binder pressure during picking, and to remain inactive during boxingof the shuttle.

3. Shuttle box tension controlling mechanism for weft replenishing loomsof the bobbin changing type having, in combination, a lay, a shuttlebox, a binder for the shuttle box, and inertia controlled tensionapplying means acting to decrease the binder pressure during transferand inactive to vary the binder pressure during boxing of the shuttle.

bin changing type having, in combination, a

lay, a shuttle box, a binder, and inertia controlled tension applyingmeans having provision for preventing increase of pressure on thebinders during the forward movement of the lay.

6. Shuttle box tension controlling mechanism for weft replenishing loomsof the bob- 1 bin changing type having, 111 combination, a

lay, a shuttle box, a binder, andinertia controlled tension applyingmeans having provision for decreasing the tension of the binder on theshuttle during rearward movement of the lay, and preventing it fromacting on the binders during forward movements of the lay.

7. Shuttle box tension controlling mechanism for weft replenishing loomsof the bobbin changing type having, in combination, a lay, a shuttlebox, a binder, a dagger rod on the lay, binder fingers on the daggerrod, an

inertia arm on the dagger rod provided with a weight below the daggerrod, and a stop for preventing the inertia arm from acting on the daggerrod during forward move ments of the lay.

In testimony whereof I have signed my name to this specification.

onann H. nears n.

